Type-writing machine.



0. GABRIELSON. TYPE WRITING MAGHINE. APPLICATION FILED FBB.13,1907. 929,933. Patented Aug. 3, 1909.

3 SHEETS-SHEET 1.

U. GABRIELSON.

TYPE WRITING MACHINE.

APPLICATION FILED FEB.13,1907.

Patented Aug. 3, 1909.

m g H G. GABEIELSON. TYPE WRITING MAGHINE.

APPLICATION FILED FEB. 13, 1907. Patented Aug. 3, 1909.

3 SHEETS-SHEET 3.

I am

' rte-1929,933

UNITED Pem ma CARL GABRIELSON, OF SYRACUSE, NEW YORK, ASSILNOR '10 L; C. SMITH & BROS. 'I1IE WRITER COMPANY, OF SYRACUSE, NEW EORK; CORPORATION OF NEW 103K.

rY'PE-wmrme MACHINE.

Sp'qificationof Letters Patent.

ratentedau s, 19(9.

Application filed February'lii, 1907. serial No. 357,202.

To all whom it may concern:

Be 1 known that I, CARL GABRIELsoN, a

citizen of the United States, and resident of Syracuse, Onondaga 'county, State of New York, have invented certain new and useful Improvements in Type-\Vriting Machines, of which thefollowing is a specification.

This invention relates to the ribbon mechanism of typewriting machines and more particularly to means for 'automaticall 're versing the longitudinal movement the ribbon as it rea'ches the end of such move-- ment in either direction.v The Object of the invention is to produce a ribbon winding and reversing mechanism which is simple in constructionand reliable in operation.

The invention-will be described in' connection with the ,accompaying drawing, in which;

Figure l is a plan view illustrating the arrangement of the shafts and connections-for turning the ribbon spools'and a portion of the-reversing mechanism; Fig. 2 isa view of the upper part of lhe frame of a typewriting machine illustrating'in front elevation the ribbon spoolsand reversing mechanism, Fig. 3is a side view of the-same;

Fig. 4 is a section approximately on" the line 44 of Fig. 3;,F1g. 5 is a perspective view of the reversing rocker and the bracket upon which it is pivot-ally mounted; Fig. 6 is a front view .partly broken'away of the spring drum,driving shaft and intermediate, connections. I

In the accompanying. drawing, the invention is illustrated as embodied in a front strike typewriting machine in which-ribbon spools are mounted on vertical axes in the upper part of the machine, being supported by the top. plate of the frame 10. The power necessary to effect the winding of the ribbon the carriage, (not show-n).

and the reversal of the ribbon movementis preferably derived from the spring drum 11; which operates the carriage, 12 indicating the band which connects the drum with Two ratchet wheels 13 and 14 and a pinion 15 are rigidly connected together and mounted to rotate on the stud 16 which supports the spring drum. A pawl '17 carried by the spring drum engages the Y ratchet wheel let and turns the same while the carriage is movipg from right to left during the operation of turned to the right.

'municates movement through ear 19, worm with the ratchet wheel 13 prevents-the pinion. h

15 -moving while the carriage is beingre- The pinion 15 com- 20 and worm gear 21 to a shat 22 arranged at the rear of themachine and'from this shaft movementis communicated to shafts 23, 24,.at the ends of the machine through 1 beveled gears, or other suitable connections.

= The shafts 23, 24, are arranged at right 26 of a rocker whichis mounted-on a studor' angles to the shaft22 and they are connected by flexible couplings to shaft sections 25., ex-

shaft 27. Each rocker hasan upright. arm- 28 and these arms are connected by a link 29 extending along the front of the machine. The arms 26 extend in opposite directions and are approximately at right angles with the arms 28 so that when'thearms 28 are moved to the right one ofthe arms'26-moves 1 downward and theother upward while the reverse takes place when the arms 28 are moved to the left. A switching device of well known construction is provided to throwf the arms 28 t'o'the right or left when they are rests. The means for rocking the arms 28 to the right or left willbe presently described.

Each of the ribbon spools comprises a hollow cylindrical core 33, an upper flange 34, a lower flange '35 and preferably a flaring or conical skirt 36 below the lower flange, which may be an, extension of the core 33. As-

shown the spool is connected with a sleeve '37 adapted to fit on the upper part of the spool shaft 38, the said shaft being provided with a tooth 39 engaging'a notch in the sleeve 37 to drive the spool. The spool is held on its shaft by means of a thumb-nut 4 0 which is screwed on to the upper end of the shaft 38; The shaft 38 is mounted in a bearing 41 and supported by an enlargement 'movedby other means beyond what may be termed theirdea'd center and to hold them' 42, resting on said bearing.- The lower end of the spool shaft carries a gear 43 by which the shaft is driven, which gear is adapted to mesh with a pinion 44 on the movable shaft section 25 when the said shaft section is in 7 The rocker has an upwardly extending arm 47, the upper end of which lies within the core of the spool and carries a lateral projection or roller 48 adapted to bear on the interior of the core when the ribbon surrounds the spool and to swing outward through an opening 49 in the core when the inner coil of ribbon has been unwound sufficiently to uncover said opening. As shown the roller 48 is pivotally mounted on a curved flange 50, which flange engages the ends of the slot 49 and assists in drawing the roller into the core. of the spool when the spool is rotated. A light spring 51 which is carried by the bracket 45 bearson an arm 52 of the rocker 46 tending to press the roller against the core of the spool and giving it a tendency to move out through the slot 49 when the latter is uncovered.

The rocker 46 has a downwardly extending arm 53, the lower end of which is ada ted to engage with the teeth of the adjacent pinion 44 when the pinion is in its lower po sition, and the roller 48 extends through the slot 49, as illustrated in Fig. 4. As shown the arm 53 has a projection 54 which engages with a stop 55 on the bracket 45 to limit the movement of the rocker and regulate the engagement of the arm 53 with the pinion 44. The arm 53 has a horizontal xtension 53' adapted to enter between t e.

teeth of the pinion 44.

The operation of the ribbon reversing mechanism is as follows: Normally the ribbon is partially wound upon both spools, one spool being free to rotate and the otherbeing positively rotated by reason of its gear 43 being in mesh with its pinion 44': The rollers 48 are therefore normally held within the cores of the spools and the arms 53 are held out of engagement with the pinions 44, as illustrated in Fig. 2. lVhen the last coil of ribbon is unwinding from the free spool, the roller 43 moves outward through the oaeniru 49 as soon as said 0 enin is uncovered, being urged outward by the spring 51. The engaging point ofthe arm 53 simultaneously moves in between the teeth of the pinion 44. As both .pinions 44 are constantly rotated while the ribbon is feeding, the engaging point of the arm 53 finds its way in between the teeth of the free pinion instantly. The continued rotation of the free pinion causes it to rise, the point 53 forming a fulcrum about Whichit rotates. As the pinion rises it carries the free end of the. shaft 25 and the arm 26 upward, rocking the arm 28 toward the center of the machlne Before the pinion 44'reaches the gear 43 the spring roller of the switching device passes the angle between the inclines 31 and throws the arm 28 over and effects the comp'letion of the reversing movement, throwing one of the inions 44 into engagement with the gear of the empty spool and the other pinion out of engagement with the gear of the full spool. The reversal of the ribbon movement is thus effected while the spools are movin througha small arc and before the last 0011 of ribbon leaves the empty spool. During the final upward movement ofthe pinion 44 it leaves the point of the arm 53 and thus free to rotate its spool. The

ribbon immediately-begins to wind on the spool and the roller 48 is withdrawn from the slot and remains within the core of the spool during the winding and unwinding of the ribbon on the same until the end of the unwinding movement. It will be understood that the ribbon spools are alikeand that the reversing devices connected with each are the same, and hence the foregoing description applies to the entire mechanism.

. Each of the ribbon spools can be instantly removed by first removing its thumb screw 40. The flaring skirts 36 facilitate placing the ribbon spools back on their shafts as they direct the rollers 48 into the spool cores.

Having described my invention What I claim and desire to secure by ent is, a

1. In a typewritin'g machine, the combination with the spools and spool shafts, of-

Letters Patgears on the spool shafts, flexibly mounted driving shafts provided with pinions adapted to mesh with the gears on the spool shafts,

and means controlled by the ribbon and adapted to engage with said pinions alternately to throw the pinions into and out of mesh with their respective gears.

2. In a typewriting machine, the combination with the spools and spool shafts, of gears on the spool shafts, flexibly mounted driving shafts provided with pinions=adapted to mesh with the gears on the spool shafts, and a.rocker adjacent to each spool and controlled by the ribbon, said rocker having an arm adapted to engage with the adjacent pinion to throw the pinion into mesh with its gear. v

3. In a ribbon reversing mechanism for typewriting machines, the co'mbinationwith a ribbon spool and spool shaft, of a flexibly mounted driving shaft for the spool, and a rocker having one arm extending into the spool and controlled by the ribbon and a sec-' 'ond arm adapted to engage with'a toothed wheel carried the flexibly mounted shaft-- ,to bringsaid shaft into driving relation with tliespoolshait. I p r v 4. atypewriting machina the combinationwith a ribbon s 001, a spool shaft and a gearthereon, of a, exibly mounted driving shaft having a pinion adapted to engage with the; gear and a single movable device having one arm controlled by the ribbon and another arm, adapted to engage withyand move said flexible shaft. to throw said gear and pinion into mesh. V I 5. In} atypewriting "machine, the combination with a ribbon spool and spool shaft and a gear carried by the' spool shaft, of a driving shaft havinga pinion, and a single movable ribbon. controlled device supported independently of the spool and the spool shaft and adapted to throw said gear and pinion into mesh as the ribbon is exhausted from the spool independent of any strain exerted by the ribbon.

6. Ina typewriting machine, the combination with a spool having a hollow core provided with a lateral slot or opening, of a,gear for driving said spool, a driving pinion movable into and out of mesh with said gear, and-a rocker having an armextending into the spool core and a second arm adapted to engage said pinion and throw it into meshwith said gear. I

7. In a typowritlng machine, the COmbl:

nation with a spoo having a hollow core and a lateral opening therein, of a pair bf gears for driving said spool, a rocker having an arm extending .into the spool and a lateral projection adapted to pass through said opening when the ribbon is unwound, said rocker having a second arm adapted to engage one of said gears and throw it into mesh :with the other when the said' rojection extends through the opening in the spool core. 1

8. In a typewriting machine, the combination with a spool having a hollow core provided with a lateral opening,'and having a, flaring skirt below said core, of a rocker having an arm extending upwardly into the spool core and normally adapted to bear on the interior of the core, and a second arm adapted to etlectv the engagement-. 01 the spool with its driving means.

9. In a typewriting machine, the combination with a ribbon spool having a hollow core provided with a lateral o ning, of a rocker having an arm extending into the core provided with a roller adapted to bear on the interior of the core, and a second arm adapted to efi'ect-the engagement of the spool with its driving means.

10. In a typewriting machine, the combination with a ribbon spool having a hollow core provided with a lateral opening, of a roeker' having an arm extending into the core provided with a roller adapted to bear said opening. J

with a hollow core,

spool with its driving means, the said spool being removablymounted on its drivingshaft and having; a. flaring skirt adapted, to pass over said roller. in placing. thespool on its shaft. i 4

7-11.v Ina typewriting machine, thecombispool, of a gear and.-

nation with a ribbon ,p-inionfor turning. saidspool, and amovable devicesupportedindependently of the spool and spool shaft and having an arm extendingintothe spool and asecond arm adapted to throw said ear and pinion into "mesh, I

the movement of said device being controlled .by'the ribbon.

' 12. In a typewriting machine, the combi-- nation of a pair of ribbon spools, a ribbon havingits ends connected with the spools, gears for driving said spools, pinions for driving the gears, means connected with the carriage for turning the pinions, andnon rotatable means operated independently of a tension on the ribbon for throwing the pinions alternately into and out of mesh with the gears.

13. In aw typewriting machine, a ribbon spool having a hollow core in combination with ribbonreversing .mechanism comprising a movable part supported independently of and extending into said core.

14. In a typewriting machine, the combination with a rotatable ribbon spool having a hollow. core, mechanism havin a movable nonrotati'ng part supported in ependently of and extend-- ing into said core.

of a ribbon reversing 15. In a typewriting machin'e, the combination with a ribbon spool arranged to rotate about a vertical axis and provided with a hollow core having a lateral opening, of a ribbon reversing mechanism having a partextending vertically into said coreand adapted to cooperate with said opening.

16. In a: typewriting machine, the com bination with a ribbon spool arranged to ro-' tate about a vertical axis and provided with a hollow core having a lateral opening, of a ribbon reversing mechanism having a movable non-rotatin part extending vertically into said core and adapted to cooperate with 17. In a typewriting machine the combination with a ribbon spool arranged to rotate about a vertical axis and provided with a hollow core having a lateral opening. of'a ribbon reversing mechanism having a movable non-rotatin part extendin into said core and adapte to cooperate wit said opening, said part being adapted to efi'ect a reversal of the ribbon movement.

, 18. In a typewriting machine, the combination with a ribbon spool arranged to rotate about a vertical axis and provided of a ribbon-reversing mechanism having a movable non-rotating part extending vertically into said core and ada ted to be controlled by the unwinding of t e ribbon.

19. In a typewriting machine, the combination with a ribbon spool, a gear connected with the spool, and a pinion for 'driv ing said gear and adapted to be moved to and from engagement therewith, of means supported independently of the spool and the spool rotatlng devices and having one member extending into the interior of the coil of ribbon wdund on-the s 001 and a second member adapted as the ribbon is exhausted from the spool, independently of any strain exerted by the ribbon, to cause the pinion to move into engagement with the spool driving" gear.

20. In a. typewnting machine, the combina'tion, with a ribbon spool, a gear con:

nected with the spool, and a pinion for driving said gear and adapted to be moved to and from engagement therewith, of a non-- rotatable rocker mounted to vibrate about an axis extending transverse to the axis of revolution of the spool, one arm of said rocker extending upwardly into the interior of the spool and within the coil of ribbon supported thereby and another arm adapted as the ribbon is exhausted from the spool, independently of any strain exerted bythe ribbon, to cause the pinion to move into engagement with thespool driving gear.

In testimony whereof I aflix my signature in presence of two witnesses.

I CARL GABRIELSON.

' I Witnesses:-

CHAS. F. PARSONS,

G. RAYMOND: REED. 

